Hot-air furnace.



E. RAENEY.

HGT AIR FURNACE. APPLICMION HLEU DEC. 1, I914 Patented Feb. 8, 1916.

n 1 E. u n H M 4 R m 5 w 0 z r 5 m WK B. E. RAINEY.

HOT MR FURNACE.

APPLICATION FILED DEC. 1. 1914.

Patented Feb. 8, 1916.

2 SHEETS-SHEET 2 UNITED STATES PATENT OFFICE.

BOYD E. RAINEY. OF ST. LOUIS. MISSOURI.

HOT-AIR FURNACE.

Application filed December 7, 1914.

Be it known that I. Born Fi. liAlNFY. a l'itizen ol' the l'nited States. and residing at St. Louis. in the State of Missouri. have invented a eertain new and useful Improvement in llot .\ir l urnaees. ot' \vhirh the following is a speritii'ation.

This invention relates to turnares. and more partieularly to furnares having a. double ja ket and a single register.

()ne of the objer'ts of this invention is to ronstruet :1 double jarhet furnar'e having improved means for supporting the easings in spaeed relation with respert to the fur nare body and the furnaee front to form a rigid StIIK'tlllt.

Another objert. is to eonstrnrt :1 double iaeket turnaee having a single register and provided with improved eonnertions between the easings and the front.

Further ohjeets'will appear from the detail deseription taken in ronneetion with the :n-eonipanying drawings. in whieh:

Figure 1 is a front elevation of a furnaro embodying this invention; Fig. 2 is a \'e1'ti eal seetion on the line 2 2. Fig. 1; Fig. is a detail perspertive of the lower part of the t'nrnaee. the front and part of the furnaee body being removed'and the outer easing be ing rut :nvay: Fig. 4 is an enlarged section on the line -}--4. Fig. 1: Fig. 5 is an em larged detail seet'on on the line Fig. 1: and. Fig. (3 is an enlarged detail section of Fig. 2.

Referring to the aeeompanying drawings. the: furnace body eonsists of an ash pit 10. a tire pot '11. and a radiator diseharging into a smoke-pipe 13. The ash pit is pro rided with a forwardly projeeting ash pit passage 11. the ire pot with a forwardly projecting fire door passage U1. and the radiator with a forwardly projecting cleanout passage 16. The furnace body sets on a base 17. provided with a ring 18 integral therewith, but spaeed from the furnace body at: the rear side of the furnace and eonneeted thereto by radial arms 20. integral with the base and the ring. This ring is shouldered as shown at 19.

A. front. preferal'ily of east iron. and which may be a single pieee or composed of one or more sections 21 bolted together as shown at 22. sets on the base 18 of the furnace body and is bolted to the passages 14. and 16 thereon. This front is pref" .erably 0f the dished type to shorten the Specification of Letters Patent.

Serial No. 875.933.

length of the passages 1t. 15 and it}. and is provided with forwardly projeeting side flanges '23 and :1 forwardly projerting top flange ".31. The flanges :23 and 24' are turned laterally and upwardly. as shown at 35 and 2t reswrtirely. The front is provided with fire and ash pit doors 27 and 2B. and with a removable door or plate 2!) for the (lean-out passage 16. In order to lorate and retain the front in position on the base 18. the base is provided with lugs 30 engaging the front. and the flanges with lugs 31 engaging the base. the lugs cooperating with one another and with the'shoulder 19.

rontinuons ring 32. preferably of T-seetion. is supported at its front portion on the upper flange 24-. and may be bolted to the edge 26 of the flange. The outer easing 5 5 may be a single pieee. or it may ronsist ot' a. pair of seetion seem-ed. at their ends. to the edges 25 of the side flanges 23 by bolts 31. or otherwise. When the easing is made up of seetions. the latter are joined in the usual 'ay by a strip 35 ot T-ser-tion; this strip is. however. only a joining n'a-mber and is not. therefore. dirertly attaehed to the front but only extends to the edges 25 of the flanges so as to abut thereagainst. in order not to break the continuity between the easing sections and the flange. The bolt 3t. behveen the seetions 33. preferably passes through a plate or washer 36 to draw the easing up tight. The outside easing. whether single or in seetions. rests. at its bottom. on the eontinuous base ring. 18. and engages. at its upper end. the continuous top ring This casing may be seeured to the top ring by bolts. although this will be ordinarily not neeessary.

The inside easing 37 has its ends bent ontvi'ardly. as shown at 38. and laterally. as shown at 39, to form flanges adapted to engage the outturned edges 25 ot' the front. and these flanges are clamped between the outside casing and the front. as shown in Figs. 4 and 5. These flanges 39 need not be perforated. since they are elaniped by the bolts 34. and the. outside casing- 33 in the corners formed between the body and the edge of the front flanges. The bottom of the inside casing is about on a level with the ash pit. and this bottom is stiffened by the usual T-shaped strip 40. which is at taehed to the casing by bolts in the usual manner. This strip 40 is not attaehed t0 the front, but terminates at the turned out till ends 38 of the inner casing. This permits an easy application of the strip after the inside casing is in place. lhe casing is supported by a series of shouldered braces or legs ll attached to the strengthening strip by bolts 42 and having forked ends 43 embracing the arms on the base. A continuous ring 44 of l-S8Cti()I1 rests on and caps the inside casing. and may be attached thereto by a few bolts. A casing 58 is hung from the ring H in spaced relation to the inside casing to provide an inside air space.

Continuous inner and outer casing sections 45 and 46 rest on and are supported by the rings 4+ and 32. These easing sections may be bolted to the rings. or simply rest thereon.

Spaced frusto-conical inner and outer casing connections 47 and 43 respectively. are provided with straight cylindrical necks 49 and 50 respectively, engaging flanges 51 and 52 respectively. of a single register set into the lloor 6]. as shown in Fig. These connecting sections are preferably secured together by braces 513. so as to form a. unitary structure. The lower ends of these connections are provided with flanges 54 and 5 formed to provide shoulders 56 and 57 respectively. so as to telescope with and rest on the inner and outer casing sections 35 and 46 respectively. In this type of furnace only a single register is used. and this register comprises a central section 58* and an outside annular section 59. separated by the flange 51.

A water pan 62 is attached to the casing 33 and projects into the air space. the open projecting part 63 being located below the inside casing. as shown in Fig. l. The pan is provided with a removable cover 64. The outside casing has. on its opposite side. the usual opening closed by a slide 65.

The general operation of this furnace is well known. The cold air enters the annular section 59 and travels downwardly within the outer jacket and upwardly within the inner jacket. and issues into the room through the central section 58. By constructing both connections 47 and 48 of conical form. there will he no interference with the air currents. whether descending or ascending. The continuous ring and H result in a braced construction. and also one which admits of the furnace being read ily assembled. By constructing the outside casing of a single piece of metal. or of sections connected by a joint which terminates at the front. the joint between this front can he made. tight. It will thus be seen that the (uitsiden-asing is supported by continuous rings. b th at the top and bottom; while the inside casing is capped by a con tinuous ring at the top and is supported on the furnace body at the bottom. The inside casing is so formed that it can be readily assembled and. when assembled. will be held by its turned edges 3d and the flanges 39 thereon in fixed definite relation with respect to the outer casing. The outside casing. as well as the inside casings 37 and 53. are. therefore. wholly supported by the edge '25 of the front. This permits either a dished or an undished front to be used. The location of the water pan below the bottom of the inside casing causes the descending currents to impact upon the water. and thus uniformly moisten the air before it is heated. The slide 65 can be openedto regu late the air currents.

It is obvious that various changes may he made in details of construction without departing from the spirit of this invention. and it is. therefore. to be understood that this invention is not to be limited to the specific construction shown and described Having thus described the what is claimed is:

1. In a double jacket furnace. a furnace body. a front wall secured thereto and having forwardly projecting side flanges provideii at their outer edges with laterally projecting portions, inner and outer casings forming \vith sald furnace body inner and outer jackets communicating at their base. the edges of said inner casing having outwardly turned flanges to engage said outign casing at a point within the angle formed said side flanges and their laterally pro jecting portions. means securing the edges of both of said casings at their point of engagement to the laterally projecting portions of said side flanges. and a register connected with said casings and having innor and outer sections communicating respectively with said jackets.

2. In a double jacket furnace. a furnace body. a front wall secured thereto. inner and outer casings arranged in spaced relation and forming with said furnace body inner and outer jackets communicating at their base. a ring on said inner casing. a casing spaced from said inner casing and sus pended from said ring and forming an insulating space between said inner and outer jackets. and a register connected with said casings and having inner and outer sec tions communicating respectively with said jackets.

i In testimony whereof I affix my signature in the presence of these two witnesses.

BOYD E. RAINF. Y. Witnesses J. H. BRUNINGA. .TAs. J. (oNNELn invention, 

